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diff --git a/docs/notes/集群.md b/docs/notes/集群.md
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--- a/docs/notes/集群.md
+++ b/docs/notes/集群.md
@@ -179,7 +179,7 @@ HTTP 重定向负载均衡服务器使用某种负载均衡算法计算得到服
 - 占用过多内存；
 - 同步过程占用网络带宽以及服务器处理器时间。
 
-<div align="center"> <img src="pics/8c4def9c-0523-4beb-abe3-46fdb6ae9657.png"/> </div><br>
+<div align="center"> <img src="pics/7f403a7a-5228-42c0-af1c-b21635c77016.jpg"/> </div><br>
 
 ## Session Server
 
@@ -193,7 +193,7 @@ HTTP 重定向负载均衡服务器使用某种负载均衡算法计算得到服
 
 - 需要去实现存取 Session 的代码。
 
-<div align="center"> <img src="pics/a30a06e1-3c6b-4a71-aa03-8aad7fc44b4e.png"/> </div><br>
+<div align="center"> <img src="pics/27fce0c6-8262-4d11-abb4-243faa2a2eef.jpg"/> </div><br>
 
 参考：
 
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